Pbn is enough ?

hello ..
i have a problem for rank my product reviews
the are a competitor i don't know what used, but Often use pbn network
so, my question is there any method to know how many blog using because i want to build a pbn network but i don't know 20 blog is enough
maybe some people said it depends for keyword ..
the keyword is verry low competition
for exeple this keyword : X-Ranker 360 Review but my review don't rank i don't know why
i use pbn ( 8 domain ) i think is not enough
and also expired web 2.0 with high authority
and forums ect ..
but without any result ..
so, i want to build a pbn +20 but i don't know is enough or nor ..
Please any one help me for that ..

Well, firstly we need to know what the metrics are for the domains on the PBN. DA/PA/TF/Age/Outgoing links/Incoming links, etc. If you're wanting to increase the amount of domains on your PBN, all you have to do is the same thing you did to get 8 on there.

Note that adblockers might block our captcha, and other functionality on BHW so if you don't see the captcha or see reduced functionality please disable adblockers to ensure full functionality, note we only allow relevant management verified ads on BHW.